The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Hydrothermal carbonization was applied in water-like phase of bio-oil for the polymerization and carbonization of sugars and sugar derivatives. The hydrothermal carbonization was carried out in an autoclave from 130 to 230°C, and solid fuels and stable oxygen containing liquid fuels were successfully obtained simultaneously. Results showed that with the temperature increased, polymerization and carbonization...
Present work analyses carbon dioxide capture process by means of chemical absorption using a different solvent regeneration technique based on the use of an ion exchange resin. The first part of the manuscript compares the behavior of MDEA aqueous solutions in the carbon dioxide absorption in a bubble column reactor regard the best available technique. On the other hand these MDEA solutions were employed...
We investigated the anisotropic permeability in three directions of three cubic shale samples from Lower Silurian Longmaxi Formation in southeastern Sichuan Basin, China. The relationship between anisotropic permeability and fracture structure as characterised by micro-computed tomography (CT) and scanning electron microscope (SEM) Maps was also investigated. At confining pressure of 3MPa, permeability...
In the present work, development and validation of reduced chemical kinetic mechanisms for several different hydrocarbons are performed. These hydrocarbons are potential representative for practical diesel fuel constituents. n-Hexadecane (HXN), 2,2,4,4,6,8,8-heptamethylnonane (HMN), cyclohexane (CHX) and toluene are selected to represent straight-alkane, branched-alkane, cyclo-alkane and aromatic...
Mercury species distribution in the flue gas from three typical coal-fired power plants have been investigated using a C-5000 sampler for Ontario Hydro Method (OHM) to evaluate specified Hg emission inventories in the largest coal-production province of China, Inner Mongolia. The feed coal, bottom ash, fly ash and gypsum have also been sampled in the field. Mercury emissions are in the dominant form...
The present investigation involves the production of biodiesel from non-edible Annona squamosa oil. Oil extraction has been done using aqueous HCl, H2SO4, and H3PO4 solutions with hexane at various temperatures. The optimum acid concentration is 20wt.% H2SO4 containing hexane with the maximum oil yield of 28.5%. The reaction order has been found to be first-order kinetics and the activation energy...
Combustion is a main source of atmospheric aerosols, including organic carbon (OC) and black carbon (BC). A pilot-scale coal combustor was used to investigate the formation of organic carbon (OC) and black carbon (BC) aerosols under various combustion conditions. It was found that BC aerosol formation was extremely sensitive to the fuel–oxidizer equivalence ratio: its concentration decreased from...
Metallurgical coke samples across the tuyere level of an operating blast furnace were analysed using a fractographic approach to identify and quantify various coke failure mechanisms. Tuyere level cokes displayed different failure mechanisms compared to the feed coke, implying a strong influence of the blast furnace reaction environment on the modification of coke failure mechanisms. The conchoidal...
Elemental compositions of biomass are essential for designing energy conversion systems. Only a few correlations to estimate the elemental compositions using the proximate analysis of raw biomass have been published so far. Recently researches on biomass torrefaction have been increasing significantly, which require performing an elemental analysis of the torrefied biomass. Torrefaction affects both...
Gasoline compression ignition (GCI) engines have a great potential to achieve the simultaneous reduction of smoke and nitrogen oxides (NOx) emissions via partially premixed combustion (PPC) using low cetane number fuel for the extended pre-combustion mixing time. The premixed combustion realised in high compression ratio engines also improves the engine efficiency with previous studies often reporting...
This paper proposes a new biomass higher heating value (HHV) prediction model using adaptive neuro-fuzzy inference system (ANFIS) approach. The 444 data related to wide range biomass based materials are composed from the open literature. The input set for the prediction model is involved of the proximate analysis components such as fixed carbon, ash and volatile matter. Three methods called grid partition,...
The focus of this work is on the modelling of evaporation and spray penetration for alternative fuels. The extension model approach is presented and validated for alternative fuels, namely, Kerosene (KE), Ethanol (ETH), Methanol (MTH), Microalgae biofuel (MA), Jatropha biofuel (JA), and Camelina biofuel (CA). The results for atomization and spray penetration are shown in a time variant condition....
Due to world trend on the emission regulations and greater demand of fuel economy, the research on advanced diesel injector designs is a key factor for the next generation diesel engines. For that reason, it is well established that understanding the effects of the nozzle geometry on the spray development, fuel–air mixing, combustion and pollutants formation is of crucial importance to achieve these...
In present study, a new designed constant volume combustion bomb (CVCB) equipped with an orifice plate and visualized by high speed schlieren photography has been employed to study the turbulent flame propagation effected by flame acceleration in the end gas region. The orifice plate is employed to achieve flame acceleration and obtain different turbulent flames at different equivalence ratios. We...
Coal/char catalytic hydrogasification (CCHG) is regarded as a direct and efficient method to produce CH4 (synthetic natural gas, SNG) and has been studied extensively in recent decades. Although many catalysts and processes have been investigated, few were reported to be successful in commercial scale operation. Ca-compounds are studied in this paper as catalysts for hydrogasification of an ash-free...
The interfacial interactions in carbonaceous solid–water slurries (CSWS) influence slurry viscosity. Additives impact the slurry viscosities by modifying the surface chemistry of the carbonaceous solids, thereby affecting the interfacial interactions in CSWS. The focus of this study was to determine the effect of the additives on the interfacial interactions which results in viscosity reduction in...
This research paper has focused on the production of green aromatics from Canola Oil Methyl Ester (CME). In order to evaluate the aromatic production statistically, General Factorial Design (GFD) was utilized. HZSM-5 catalyst with two different Si/Al ratios of 50 and 80 was applied in the experiments. The effects of two operating parameters namely reaction temperature and Weight Hourly Space Velocity...
This study focuses on the impacts of minerals naturally existed in different carbonaceous materials on the thermal processing of their blends with bamboo. Combustion characteristics, such as ignition temperature, peak temperature and burnout temperature, were studied using Thermogravimetric Analysis (TGA) to understand how thermal processing was affected by blending with different types of carbonaceous...
Gas injection process is one of the most efficient improved oil recovery methods for conventional oil reservoirs. The efficiency of this process is strongly dependent on minimum miscibility pressure (MMP) which is usually determined through very expensive and time-consuming laboratory tests. So, this paper is concerned with the use of hybrid approach, combining particle swarm optimization and adaptive...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.